She does not look adorably wide-eyed and quirky; she looks concussed. There is a distinct and important difference.
Also, she can't act. Or at least she was absolutely terrible in The Hitchhiker's Guide to the Galaxy, which basically means she must die, because screwing up Douglas Adams is one of the worst sins. And, yeah, maybe the casting was bad, but anyone who plays Trillian by looking like a massive idiot for the whole film needs to be punted halfway to Betelgeuse.
At least it seems that most of her recent stuff was truly, mind-bendingly awful, so maybe she'll fade into a decent obscurity and I won't have to stare at her insipid face any more.